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Old 02-23-2014, 05:49 PM
Seanc Seanc is offline
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Join Date: Feb 2014
Posts: 5
Default What is this on my cucumber seedlings?

I recently torn my entire grow room Dow and sterilized everything because I thought it had powdery mildew. I just replanted the cucumbers and this white stuff has re-appeared, thoughts anyone please.

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